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Fairchild Semiconductor Electronic Components Datasheet

74F240 Datasheet

Octal Buffers/Line Drivers with 3-STATE Outputs

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74F240, 74F244
Octal Buffers/Line Drivers with 3-STATE Outputs
May 2007
tm
Features
3-STATE outputs drive bus lines or buffer memory
address registers
Outputs sink 64mA (48mA mil)
12mA source current
Input clamp diodes limit high-speed termination
effects
General Description
The 74F240 and 74F244 are octal buffers and line driv-
ers designed to be employed as memory and address
drivers, clock drivers and bus-oriented transmitters/
receivers which provide improved PC and board density.
Ordering Information
Order Code
74F240SC(1)
74F240SJ(1)
74F240PC
74F244SC(1)
74F244SJ(1)
74F244MSA(1)
74F244PC
Package
Number
Package Description
M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
MSA20 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide
N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
Note:
1. Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering number.
Connection Diagrams
74F240
74F244
©1988 Fairchild Semiconductor Corporation
74F240, 74F244 Rev. 1.4
www.fairchildsemi.com


Fairchild Semiconductor Electronic Components Datasheet

74F240 Datasheet

Octal Buffers/Line Drivers with 3-STATE Outputs

No Preview Available !

Logic Symbols
IEEE/IEC
74F240
IEEE/IEC
74F244
Unit Loading/Fan Out
Pin Names
Description
OE1, OE2
OE2
I0–I7
I0–I7
O0–O7, O0–O7
3-STATE Output Enable Input (Active LOW)
3-STATE Output Enable Input (Active HIGH)
Inputs (74F240)
Inputs (74F244)
Outputs
Note:
2. Worst-case 74F240 enabled; 74F244 disabled.
U.L.
HIGH/LOW
1.0 / 1.667
1.0 / 1.667
1.0 / 1.667(2)
1.0 / 2.667(2)
600 / 106.6 (80)
Input IIH / IIL,
Output IOH / IOL
20µA / –1mA
20µA / –1mA
20µA / –1mA
20µA / –1.6mA
–12mA / 64mA (48mA)
Truth Tables
74F240
OE1 D1n O1n OE2 D2n O2n
HXZHXZ
LHL LHL
L LHL LH
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
74F244
OE1 D1n O1n OE2 D2n O2n
HXZHXZ
L HH L HH
LLLLLL
©1988 Fairchild Semiconductor Corporation
74F240, 74F244 Rev. 1.4
2
www.fairchildsemi.com


Part Number 74F240
Description Octal Buffers/Line Drivers with 3-STATE Outputs
Maker Fairchild
Total Page 10 Pages
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